CA2280843C - Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products - Google Patents

Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products Download PDF

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Publication number
CA2280843C
CA2280843C CA002280843A CA2280843A CA2280843C CA 2280843 C CA2280843 C CA 2280843C CA 002280843 A CA002280843 A CA 002280843A CA 2280843 A CA2280843 A CA 2280843A CA 2280843 C CA2280843 C CA 2280843C
Authority
CA
Canada
Prior art keywords
coils
top surface
marker
magnetic field
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002280843A
Other languages
English (en)
French (fr)
Other versions
CA2280843A1 (en
Inventor
Richard L. Copeland
Kevin R. Coffey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sensormatic Electronics Corp
Original Assignee
Sensormatic Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of CA2280843A1 publication Critical patent/CA2280843A1/en
Application granted granted Critical
Publication of CA2280843C publication Critical patent/CA2280843C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G08B13/2411—Tag deactivation

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Measuring Magnetic Variables (AREA)
CA002280843A 1997-02-18 1998-02-04 Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products Expired - Fee Related CA2280843C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/801,489 US5905435A (en) 1997-02-18 1997-02-18 Apparatus for deactivating magnetomechanical EAS markers affixed to magnetic recording medium products
US08/801,489 1997-02-18
PCT/US1998/002475 WO1998038610A1 (en) 1997-02-18 1998-02-04 Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products

Publications (2)

Publication Number Publication Date
CA2280843A1 CA2280843A1 (en) 1998-09-03
CA2280843C true CA2280843C (en) 2007-10-23

Family

ID=25181247

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002280843A Expired - Fee Related CA2280843C (en) 1997-02-18 1998-02-04 Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products

Country Status (9)

Country Link
US (1) US5905435A (de)
EP (1) EP0962002B1 (de)
JP (1) JP3954654B2 (de)
AR (1) AR011151A1 (de)
AU (1) AU734864B2 (de)
BR (1) BR9807841B1 (de)
CA (1) CA2280843C (de)
DE (1) DE69829950T2 (de)
WO (1) WO1998038610A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424262B2 (en) * 1998-08-14 2002-07-23 3M Innovative Properties Company Applications for radio frequency identification systems
US6084515A (en) * 1999-01-07 2000-07-04 Sensormatic Electronics Corporation Coil array for EAS marker deactivation device
EP1266365A1 (de) * 2000-03-17 2002-12-18 Redcliffe Magtronics Limited Aktivierung und deaktivierung von magnetischen elementen
US20040069851A1 (en) * 2001-03-13 2004-04-15 Grunes Mitchell B. Radio frequency identification reader with removable media
GB2415865A (en) * 2004-07-02 2006-01-04 Redcliffe Ltd Arrangement of demagnetising coil pairs for EAS tag deactivation unit
JP2006220420A (ja) * 2005-02-08 2006-08-24 Lintec Corp 磁気検知タグ判定装置
US20090212952A1 (en) * 2008-02-22 2009-08-27 Xiao Hui Yang Method and apparatus for de-activating eas markers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184163A (en) * 1976-11-29 1980-01-15 Rca Corporation Broad band, four loop antenna
US4160978A (en) * 1977-08-10 1979-07-10 Duhamel Raymond H Circularly polarized loop and helix panel antennas
US4510489A (en) * 1982-04-29 1985-04-09 Allied Corporation Surveillance system having magnetomechanical marker
US5142292A (en) * 1991-08-05 1992-08-25 Checkpoint Systems, Inc. Coplanar multiple loop antenna for electronic article surveillance systems
US5225807A (en) * 1991-09-16 1993-07-06 Knogo Corporation Method and apparatus for sensitizing and desensitizing targets for electronic article surveillance systems
US5341125A (en) * 1992-01-15 1994-08-23 Sensormatic Electronics Corporation Deactivating device for deactivating EAS dual status magnetic tags
US5404147A (en) * 1992-10-28 1995-04-04 Sensormatic Electronics Corporation EAS system loop antenna having three loops of different area
EP0749621B1 (de) * 1994-03-10 1998-07-15 Minnesota Mining And Manufacturing Company Deaktivierungsvorrichtung für magnetische etiketten in einem elektronischen artikel-überwachungssystem
US5499015A (en) * 1994-09-28 1996-03-12 Sensormatic Electronics Corp. Magnetomechanical EAS components integrated with a retail product or product packaging
US5594420A (en) * 1995-02-02 1997-01-14 Sensormatic Electronics Corporation Rotating magnet array for deactivating EAS markers

Also Published As

Publication number Publication date
BR9807841A (pt) 2000-09-12
AR011151A1 (es) 2000-08-02
AU734864B2 (en) 2001-06-21
US5905435A (en) 1999-05-18
CA2280843A1 (en) 1998-09-03
AU6322198A (en) 1998-09-18
JP3954654B2 (ja) 2007-08-08
EP0962002A4 (de) 2002-04-17
DE69829950D1 (de) 2005-06-02
JP2002511163A (ja) 2002-04-09
BR9807841B1 (pt) 2010-05-18
DE69829950T2 (de) 2005-09-29
WO1998038610A1 (en) 1998-09-03
EP0962002A1 (de) 1999-12-08
EP0962002B1 (de) 2005-04-27
HK1025830A1 (en) 2000-11-24

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed